through
preposition
°From one side of an opening to the other.
"I went through the window."
°Entering, then later exiting.
"I drove through the town at top speed without looking left or right."
adjective
°Passing from one side of an object to the other.
"Interstate highways form a nationwide system of through roads."
°Finished; complete.
"They were through with laying the subroof by noon."
verb
°From one side to the other by way of the interior.
"The arrow went straight through."
°From one end to the other.
"Others slept; he worked straight through."
noun
°A large slab of stone laid on a tomb.